Design of An Inside-Human-Body Blood Pump Driver or A Wireless Bio-Diagnosis System
Date Issued
2008
Date
2008
Author(s)
Lin, Wei-Chieh
Abstract
This thesis focuses on driver for blood pump inside human body and which converts, inside human body, DC voltage into a high-voltage pulse for driving blood pump, so bio-diagnosis sensor can analyze blood. The structure of the driver is composed of ring oscillator, nonoverlapping clock generator, charge pump and level shifter, and it uses low dropout regulator (LDO) to reduce noise from the voltage source.irst, some charge pump circuits are reviewed. After comparing strengths and weaknesses of the circuits, a suitable charge pump is chosen to design high-voltage pulse driver. Second, a new charge pump is designed for converting DC into high-voltage pulse. In addition, this charge pump is designed to re-develop a new high-voltage pulse driver. These two newly designed drivers have their own strengths and weaknesses in different applications. Then, these structures are modified taking the drivers’ influence on LDO into consideration. Finally, the circuit is simulated by HSPICE, the layout is designed, and the chip is tested.
Subjects
charge pump
high-voltage pulse
driver
Type
thesis
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